Answer:
15y - 25 = 5 (3y + -5) which makes the equation 15y - 25 = 5 (3y - 5)
Step-by-step explanation:
In order to factor with a GCF, what I like to do is divide the whole first equation by whatever the distributed number in the second equation is.
This makes 3y + -5, which is just 3y - 5.
This makes your answer known. Once you have your answer, insert it BACK into the equation to make sure it is equal. (In this case, I have checked, and it is indeed the correct answer.)
So your answer has been found at this point.
Hope this helps.
Let x = baby dinosaurs
y = adult dinosaurs
equation 1
total paintings = 15 painting x + 7 paintings y
equation 2
baby dinosaurs = 3 times adult
x= 3y
substitute x= 3y to equation 1
y = 4
x = 12
There are 12 baby dinosaurs and 4 adult dinosaurs in a herd with 208 total paintings
Step-by-step explanation:
The ratio of cats to dogs at a pet store is 4:5. It means that if there are 4 cats in the store then there are 5 dogs, if there are 8 cats(4×2) there then there will be 10 dogs(5×2).
78% of 50 points = 0.78 x 50
78% of 50 points = 39
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Answer: The student needs to score 35 points.
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